C# 模拟网页登录[转]

经过实测，此代码可用。

using System.Net;

public class HttpRec

{

public string _Url = "http://login.xiaonei.com/Login.do";

private string _strErr;

private CookieContainer _CookieContainer = new CookieContainer();

public string GetCode()

{

HttpWebRequest rqq = (HttpWebRequest)HttpWebRequest.Create(_Url);

rqq.Method = "Get";

rqq.KeepAlive = true;

if (rqq.CookieContainer == null)

{

rqq.CookieContainer = _CookieContainer;

}

HttpWebResponse rpp = (HttpWebResponse)rqq.GetResponse();

return "";

}

public string LoginWeb(string PostData)

{

string str = string.Empty;

HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(_Url);//创建req

req.Accept = "*/*"; //接受任意文件

req.UserAgent = " Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; EmbeddedWB 14.52 from: http://www.bsalsa.com/ EmbeddedWB 14.52; .NET CLR 2.0.50727)"; // 模拟使用IE在浏览

req.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.16) Gecko/20080702 Firefox/2.0.0.16";

req.KeepAlive = true;

req.CookieContainer = _CookieContainer;

if ((PostData != null & PostData.Length > 0) || _Url.Contains("?"))

{

req.Method = "POST";

req.ContentType = "application/x-www-form-urlencoded";

byte[] b = Encoding.Default.GetBytes(PostData);

req.ContentLength = b.Length;

req.AutomaticDecompression = DecompressionMethods.GZip;

System.IO.Stream sw = null;

try

{

sw = req.GetRequestStream();

sw.Write(b, 0, b.Length);

}

catch (System.Exception ex)

{

this._strErr = ex.Message;

}

finally

{

if (sw != null) { sw.Close(); }

}

}

HttpWebResponse rep = null;

System.IO.StreamReader sr = null;

try

{

req.Method = "GET";

rep = (HttpWebResponse)req.GetResponse();

sr = new System.IO.StreamReader(rep.GetResponseStream(), Encoding.UTF8);

str = sr.ReadToEnd();

if (sr != null)

{

sr.Close();

}

}

catch (Exception e)

{ MessageBox.Show(e.Message); }

return str;

}

}

//实例应用

string strId = "XXXXXXXXXX";//用户名

string strPassword = "********";//密码

string strsubmit = "YES";

string postData = "email=" + strId;

postData += ("&password=" + strPassword);

postData += ("&Accept=" + strsubmit);

HttpRec.HttpRec HttpRec = new HttpRec.HttpRec();

HttpRec.GetCode();

string content = HttpRec.LoginWeb(postData);

textBox1.Text = content;

HttpRec._Url = "http://tycoon.xiaonei.com/AjaxTycoon.do?action=get&select_type=1";

content = HttpRec.LoginWeb("");

textBox1.Text = content;